Science / Geology / Hard Water: Water that has a significant amount of dissolved calcium and magnesium ions. This water performs poorly with most soaps and detergents and leaves a scaly deposit in containers where it is heated or evaporates. It can frequently be improved through the use of home-based water treatment systems.
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Hard Adverb Synonyms: intently, carefully, earnestly
Hard Adjective Synonyms: difficult, perplexing, knotty, puzzling, baffling, enigmatic, intricate, complicated, complex, tangled, involved, thorny, incomprehensible, inscrutable, unsolvable, insoluble, tough
Hard Verb Synonyms: rigid, stiff, solid, inflexible, firm, dense, condensed, compressed, close, solidified, hardened, stony, rocklike, concrete, petrified, granite(-like), flinty, steely, tough, rugged, leathery, callous, unyielding, adamant(ine), impenetrable, obdurate
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Water Noun Synonyms: H2O, distilled water, tap water, drinking-water, bottled water, spa water, still water, soda (water), effervescent water, mineral water, sea water, salt water, ditch-water, dishwater, bath-water, branch water, Adam's ale, Latin a
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Entertainment / Photography / Water Softeners: Are used to eliminate most of the minerals and slats found in hard water. MORE
Science / Chemistry / Water Hardness: Hard water is water contaminated with compounds of calcium and magnesium. Dissolved iron, manganese, and strontium compounds can also contribute to the 'total hardness' of the water, which is usually MORE
Business / Finance / Roll, Richard: Author of path-breaking work on asset pricing including the famous Roll critique. Finance professor at UCLA. MORE
Business / Agriculture / Safe Drinking Water Act (SDWA): P.L. 93-523 (December 16, 1974) as amended, is the key federal law for protecting public water systems from harmful contaminants. First enacted in 1974, the Act, as amended, is administered by the Env MORE
Business / Real Estate / Safe Drinking Water Act: Enacted by Congress in 1974, this federal law administered by the EPA and equivalent state regulators to establish and enforce drinking water standards. MORE
Business / Machine Shop / Rockwell Hardness Test: The most common hardness testing method. This procedure uses a minor load to prevent surface irregularities from affecting results. There are nine different Rockwell hardness tests corresponding to co MORE